Add a readme file to workflows

.github/workflows/README.md

@@ -0,0 +1,93 @@
+# Workflows for Testing
+The workflows are contained in .yml files and use the callable workflow method.
+Workflows can be triggered from PR, creation or merge, and on a scheduled timer.
+There are a few that only get triggered manually.
+
+## Scheduled Workflows
+- daily-schedule.yml executes the daily-build.yml which first checks that there are changes
+    * tarball.yml to create a source.zip and source.tar.gz
+    * cygwin-cmake.yml to test on cygwin
+    * cmake-script.yml to test and report to my.cdash
+    * cmake-par-script.yml to test with released MPI and report to my.cdash
+    * cmake-par-source.yml to test with MPI default branch and report to my.cdash
+    * cmake-analysis.yml to test with LEAK and ADDRESS sanitizers and report to my.cdash
+    * cmake-ctest.yml to create signed binaries with commit hash in the name
+    * abi-report.yml to compare ABI to the last released binaries
+    * release-files.yml uploads new binaries to snapshots
+    * remove-files.yml remove previous binaries
+- h5py.yml executes Python tests for h5py
+- markdown-link-check.yml checks the links in markdown files
+- scorecard.yml executes code-scanning and uploads to Github dashboard
+- vfd.yml executes vfd-main.yml with combos of Release and Debug
+    * vfd-subfiling.yml configures, builds, and tests MPI with subfiling feature
+- vol.yml calls the following workflows
+    * vol_rest.yml tests the REST VOL connector
+    * vol_ext_passthru.yml tests the external passthrough VOL connector
+    * vol_async.yml tests the asynchronous I/O VOL connector
+    * vol_cache.yml tests the cache VOL connector
+    * vol_adios2.yml tests the ADIOS2 VOL connector
+    * vol_log.yml tests the Log-based VOL connector
+
+## Manual Only Workflows
+- publish-branch.yml publishes a local folder to the support.hdfgroup bucket
+- publish-release.yml publishes release binaries to the support.hdfgroup bucket
+- release.yml creates binaries for an official release or snapshot
+    * tarball.yml to create a source.zip and source.tar.gz
+    * cmake-ctest.yml to create signed binaries
+    * abi-report.yml to compare ABI to last released binaries
+    * release-files.yml uploads new binaries to releases page
+
+## Triggered Workflows
+- autotools.yml
+- clang-format-check.yml runs clang-format and reports issues
+- cmake.yml
+- codespell.yml checks spelling
+- cve.yml executes test_hdf5_cve.sh script
+- hdfeos5.yml configures and builds HDF5 then tests HDF-EOS5
+- linkchecker.yml verifies the links in generated doxygen files
+- netcdf.yml configures and builds HDF5 then tests NetCDF
+
+## Workflows called by autotools.yml
+- main-auto-spc.yml configure, build, and test HDF5 with:
+    * API default v1_6
+    * API default v1_8
+    * API default v1_10
+    * API default v1_12
+    * API default v1_14
+    * using no deprecated
+    * in debug mode and -Werror compiler option
+    * in release mode and -Werror compiler option
+- main-auto-par-spc.yml configure, build, and test HDF5 with CFLAGS=-Werror
+- main-auto-par.yml configure, build, and test HDF5 with openmpi
+- main-auto.yml configure, build, and test HDF5
+- intel-auto.yml configure, build, and test HDF5 with Intel OneAPI on Linux and Windows
+- nvhpc-auto.yml configure, build, and test HDF5 with nvhpc
+- aocc-auto.yml configure, build, and test HDF5 with AOCC and OpenMPI
+- testxpr-auto.yml configure, build, and test HDF5 with HDF_TEST_EXPRESS=0
+
+## Workflows called by cmake.yml
+- main-cmake-spc.yml configure, build, and test HDF5 with:
+    * API default v1_6
+    * API default v1_8
+    * API default v1_10
+    * API default v1_12
+    * API default v1_14
+    * API default v2_0
+    * using system zlib
+    * using zlibng
+    * using no filters
+    * in debug mode and -Werror compiler option
+    * in release mode and -Werror compiler option
+    * with minimum cmake Version 3.18
+- main-cmake.yml configure, build, test, and package HDF5 on Ubuntu, macOS, and Windows
+- cmake-bintest.yml test binary packages created by main-cmake.yml
+- main-cmake-par.yml configure, build, and test HDF5 with openmpi
+- main-cmake-par-spc.yml configure, build, and test HDF5 with HDF5_ENABLE_WARNINGS_AS_ERRORS=ON
+- intel-cmake.yml configure, build, and test HDF5 with Intel OneAPI on Linux and Windows
+- nvhpc-cmake.yml configure, build, and test HDF5 with nvhpc
+- aocc-cmake.yml configure, build, and test HDF5 with AOCC and OpenMPI
+- testxpr-cmake.yml configure, build, and test HDF5 with HDF_TEST_EXPRESS=0
+- julia-cmake.yml configure and build HDF5, then test Julia hdf5 source
+- msys2-cmake.yml configure, build, and test HDF5 on mingw32, mingw64, ucrt64, clang64
+- i386-cmake.yml configure, build, and test HDF5 on 32-bit Linux
+